*{
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box
}
body{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* background-color: #4caf50; */
    /* color: #fff; */
    font: 14px/1.5 "Helvetica Neue",Helvetica,Arial,"Microsoft Yahei","Hiragino Sans GB","Heiti SC","WenQuanYi Micro Hei",sans-serif;
}
.title{
    width: 100%;
    height: 60px;
    font-size: 30px;
    line-height: 60px;
    font-weight: normal;
    text-align: center;
}
body>div{
    width: 600px;
    height: auto;
}
.fz_20{
    text-align: center;
    font-size: 20px;
    margin-bottom: 15px;
}
.label{
    width: 80px;
    text-align: right;
    margin-right: 5px;
}
.setting{
   border: 1px dashed #ccc;
   padding:20px;
}
label{
    display: flex;
    height: 30px;
    justify-content: center
}
input[type='text'],
input[type='number']{
    height: 20px;
    text-indent: 5px;
}
input[type='button']{
    margin: 0 auto;
    display: block;
    padding: 0 20px;
    cursor: pointer;
}
hr{
    border: 1px dashed #ccc;
    margin: 20px 0;
}
th,
td{
    width: 180px;
    text-align: center;
    padding: 5px;
}
#result{
    display: block;
    margin-top: 20px;
}
.show{
    margin: 40px 0;
    padding: 20px 0;
    border: 1px dashed #ccc;
}
.show table{
    margin: 0 auto;
}